Alois riedler



(No Model.)

A. RIEDLER.

- CONTROLLED VALVE.

No. 439, 24. Patented Nov. 4,1890.

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- UNITED STATES PATENT OFFICE.

ALOIS RIEDLER, OF BERLIN, GERMANY.

CONTROLLED VALVE.

SPECIFICATION forming part of Letters Patent No. 439,824, dated November 4, 1890.

Application filed January 23,1890. Serial No. 337,843. (No model.) 7

To all whom it may concern.-

Be it known that I, ALoIs RIEDLER, professor at Berlin, a subject of the King of Prussia,

residing at Berlin,have invented certain new and useful Improvements in Controlled Valves, of which the following is a full, exact, and clear specification.

This invention relates to controlled valves for pumps, blowing-engines, air-compressors, &c., that open automatically, but are closed by the action of a separate power, as by the action of a spring, weight, or liquid under pressure; and it consists in the combination of a valve, a valve-casing, a rocker-shaft extending through said casing, an elbow-lever mounted on said shaft within said casing, a cylinder formed in the wall of said casing, a piston fitted to said cylinder, a link connecting said lever to said piston, a lever secured to said shaft outside of the casing, a rod connecting said lever to the free end of a guidelever, a roll carried by saidrod or guide-lever, and a cam constructed and arranged to act upon said roll to raise the transmitting-gear from the valve, as will be hereinafter described.

It further consists in the combination of the delivery-valve of one side of a double-acting pump or compressor, the suction-valve of the opposite side of the same pump or compressor, rocking levers constructed and arranged to act upon each of said valves to hold them to their seats without being connected thereto, a rod or other device connecting said levers to cause them to Work in unison, devices, substantially as described, for applying a constant pressure to said levers to force said valves to their seats, and a rotating cam and intervening transmitting-gear constructed and arranged to relieve said valves from said constant pressure to permit them to open automatically, and at the proper time allow said constant pressure to again act upon said valves to close them.

Figure 1 of the drawings is a sectional elevation of so much of a double-acting pump as is necessary to illustrate my invention, the cutting plane being through the center of the suction and delivery valves at one end of the pump cylinder, the suction and delivery valves at the other end of the cylinder being shown in dotted lines within their casings,

which are shown in elevation, this figure illustrating the manner of applying liquid-press MPG to the closing of the valves; and Fig. 2 is a central vertical section through the delivery-valve casing, and illustrates one way of applying a spring-pressure to close the valves.

In the drawings, a is the double-acting pump-piston working in the cylinder b, of ordinary construction and operated in any well-known manner. The cylinder communicates at one end, through the passage 1), with the suction-Valve casing c, and in like manner at its other end with the suction-valve casing c. In said casingscand c are located the-snction-valves dand cl, respectively, the latter being shown only in dotted. outline. These valves may be of any well-known construction and mounted in any well-known manner.

Immediately above the casings c and c are the delivery-valve casings e and e, respectively, separated from the suction-valve casings by the delivery-valves e and e and their seats e and c the valve 6 and seat 6 being shown only in dotted lines.

In the drawings, the gear for controlling the operation of the valves is shown as applied only to the delivery-valve at one end of the pump-cylinder and the suction-valve at the other end thereof, as being sufficient to illustrate my invention, it being understood that to work the other delivery and suction valves the gear is to be duplicated.

Each of the casings e and e has mounted in suitable bearings therein a horizontal shaft f, which extends at one end through a packing-box in said casing and has secured thereon inside of said casing a lever g g, the arm 9 of which is arranged to hear at its free end upon the hub of the inlet-valve e but is not connected thereto.

As a separate and constant power for closing the valve, the liquid pressure in the delivery-chamber itself may be used, and to this end I form in each of the casings e and e a horizontal open-ended cylinder it, provided with a suitable packing-box, and mount therein a piston h, connected by the rod 71 with the upper end of the arm g of the lever g g, as shown in Fig. 1, all being so arranged that the liquid or gaseous pressure within the casing e or e will act upon the inner end of said piston to move it outward, and thereby move the lever g g and its shaft about the axis of said shaft f in the direction indicated by the arrow 2, and thus force the valve 6 to its seat.

The shaft f has secured thereon,outside of the casing e, an arm j, (shown only in" dotted lines,) the free end of which is pivoted to one end of the rod j, the opposite end of which carries an anti-friction roll or truck is, and is guided in its endwise movements by the radius-arm Z, or any other'suitable guiding device of well-known construction.

The anti-friction roll. it rests in contact with and is acted upon by the cam m, mounted upon the shaft m and arranged to be revolved continuously in the direction indicated by the arrow 3. The throw of said cam, (indicated bythe curved linen/77],) acting upon the roll 70, moves the rod j endwise, thereby partially rotating the shaft f in the direction the reverse of that indicated by the arrow 2 and raising the free end of the arm g, thus leaving the valve 6 free to open automatically when the piston a'commences to move toward that end of the cylinder 1) which is in communication with the valve-chambers c and e. Duringthis time the cam on has to overcome the liquid or gaseous pressure on the inner end of the piston h, and said piston is moved inward by arm g. hen the point 92' of the cam m has reached the roller 'k, the valve-closing arm 9 has reached the limit of its upward movement, and the valve e is entirely free to open, having in opening only to overcome its own resistance.

The inward movement of the piston h, and the consequent raising of the free end of the arm g, takes place sometime before the change of stroke of the pump-piston a and the time when the valve 6 must open. During that part of the revolution of the cam on that the concentric portion thereof from n to n is passing beneath the roll the arm 9 remains in its raised position, but as the cam continues to revolve after the point n of its periphery has reached the roll it said roll will slide down the curve n to n of said cam, being impelled thereto by the constant pressure on the inner end of the piston h, which pressure is large enough to overcome all resistance of the valves and the connecting-gear, and as a consequence of such movement the free end of the arm 9 is moved down upon and gradually forces the valve e to its seat, upon which it is firmly pressed when the point 71 on'the periphery of the cam reaches the roll k, in which closed position the valve 6 remains until the point '17, again reaches the roll is. The valve (2 is entirely closed when the stroke of the pump-piston toward the valve-casing c is completed and a stroke of said pump-piston in the opposite direction commences during which stroke the valve 6 remains closed, but it is relieved from the load exerted on it by the constant liquid or gaseous pressure operating through the pis ton h. This relieving commences when the point n on the periphery of the cam reaches the roll 70, as before described.

The load must be relieved, and the arm g be raised so that the valve 6 shall be left free to open automatically at the beginning of the next stroke of the pump-piston a toward the suction-valve casin g 0. Consequently the cam m. must be so set and secured on its shaft that the valve 6 will be closed just when the pumppiston changes its stroke, or, in other words, when the crank that drives said piston is passing its dead-point, which limits the movement of the pump-piston toward the valvecasings c and e, and the closing of the valve e ought to commence when the pump-piston is at or near half-stroke. valve e from the load exerted by the piston 72/ may begin at n soon after the said valve is closed and the stroke has changed.

The delivery-valve 6 (shown in dotted lines in casing e and constructed and arranged to deliver the water or air from the opposite end of the pump-cylinder b) may be fitted with and controlled by a duplicate set of gear, such as above described for working the valve 6 If desired, the suction-valves d and d may be operated and controlled in the same way; but as there is no constant water or air pressure in the suction-casings for closing these suction-valves, it will be necessary to arrange a cylinder outside of said casing, as shown in dotted lines at 0, Fig. 1, the interior of said cylinder being in communication by means of the pipe 0 with the interior of the deliveryvalve casing e, as shown.

The cylinder 0 has fitted therein a piston 0 which is connected by the rod 0 to the free end of the lever 19, firmly secured upon the shaft 19, mounted in bearings formed in the suction-valve casing c in the same manner that the shaft f is mounted in the casing e, and said shaft has mounted thereon within the casing c the arm or lever 19 arranged to act upon the valve d without being connected thereto.

To control each valve by independent gear, as above described, would unnecessarily complicate the apparatus, and long pipes for conveying the pressure to the pistons for closing the suction-valves would lead to practical inconvenience, and hence I prefer to connect the suction-valve at one end of the pump-cylinder with the gear for controlling the delivery-valve at the other end of said cylinder, as shown in full lines in the drawings, where one pressure-piston, one spring, or weight controls one delivery-valve and one suction-valve by simply connecting the shafts f and p by means of the levers p and q and the rod 1', as shown.

As the suction-stroke on one side of the pump-piston commences at the same time that the delivery-stroke for the other side of said piston begins, it follows that the deliveryvalve at one end of the pump-cylinder and the suction-valve at the oth-erend of said cyl- The relieving of the regulated by adjusting the lengths of the rods j and g by means of the coupling-nuts j and The cam m does not close any of the valves positively nor does-it open them. It

only raises the Working levers or arms g and p and the parts connected with the oscillating shafts f and p, and thereby relieves the valves from the pressure exerted on them by the piston 71. and allows the easy and automatic opening of the valves, and the closing of the valves is done by the action of the pressure on the piston 77. being transmitted to the valves by the arms 9 and 13 but the time of this'action and the speed of closing the valve is entirely controlled by the cam.

Instead of the oscillating shafts f and p projecting through the valve-casings, any suitable shafts outside of the casings may be used, and the closing movement may be transmitted to the valves by means of reciprocating spindles working vertically through packingboxes in the valve-casing cap, as shown and descrlbed in Letters Patent N 0. 395,17 4, granted to me December 25, 1888. The pressurepiston may also be placed outside of the easing and the movement of the piston be transmitted to the valve, and the pressure on said piston may be exerted byaliquid or airpressure independent of the pressure in the valvecasing; or the water or gaseous pressure may be replaced by a spring, as shown in Fig. 2, or by a weight.

What I claim as new, and desire to secure by Letters Patent of the United States, is

l. The combination of the delivery-valve at 40 one side of a double-acting pump or compressor piston, the suction-valve at the other side of the same piston, rocking levers constructed and arranged to -act upon each of said valves to hold them to their seats with- 5 out being connected thereto, a device connecting said levers to cause them to work in unison, devices, substantially as described, for applying a constant pressure to said levers to force said valves to their seats, andarotating 5o cam and intervening transmitting'gear constructed and arranged to'relieve said valvesfrom said constant pressure to permit them to open automatically and at the proper time allow said constant pressure to again act upon 5 5 said valves to close them.

2. The combination of the valve e the cas ing e, the rocker-shaft f, extending through said casing, the elbow-lever g g, mounted on said shaft within said casing, the cylinder h, formed in the wall of the casing e, the piston h, fitted to said cylinder, the link ql, connecting the lever g to said piston, the lever j,secured to the shaft f outside of the casing, the rod j, the roll 70, the cam m, and a guide for the roll-carrying end of said rod j, all constructed, arranged, and operating substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ALOIS RIEDLER.

Witnesses;

Nrc. J os. LASCHET, CARL LEIST. 

